Omni 0.9.0 is released

Notes:

Please uninstall any old versions of omni before installing this release. This new version of omni supports two (possible simultaneous) types of devices. The first is the old style compiled device library. The second is the new direct XML files.
If changes need to be made to a device, you only need to edit the corresponding XML file. You do not need to recompile omni.

Changelog:

- Omni has switched from compiled device support to XML device support!
(Although it still supports compiled devices)
- Omni is also in shutdown mode for a 1.0 release!
- Switched from DTD to XSD.
- removed using namespace std and switched to adding std:: prefixes.
- switched from char *'s to const char *'s.
- fixed/rearchitected the DeviceOption in devices.
- fixed trap in OmniFoomaticGenerator.
- added FORM_GERMAN_12_X_250_FANFOLD.
- brought test/ subdirectory up to date.